Volta Park Day lived up to its familiar, neighborhood charm: hamburgers, hot dogs, coconut cake, popcorn, snow cones with the slide, water dunk, sprinklers, band and flea market. Moms, dads and the kids were still smiling, although the picnic was cut short by thunder and light rain around 5:15 p.m. on June 12. The park’s C.M. Anderson reminds us that the Volta Park pool opens its full summer schedule on June 21: Tuesday through Thursday, 1 to 8 p.m., public; Saturday and Sunday, noon to 6 p.m.; closed Monday.